Energetics of mixing and transport phenomena in Cd-X (X=Pb, Sn) melts

  • R P Koirala Department of Physics, MMAMC, Biratnagar, Tribhuvan University http://orcid.org/0000-0002-6022-3615
  • I Koirala Central Department of Physics, Tribhuvan University, Kirtipur
  • D Adhikari Department of POhysics, MMAMC, Tribhuvan University, Biratnagar
Keywords: Mixing properties, Transport properties, Diffusion, Free energy of mixing.

Abstract

We report a quasi-chemical study of the thermodynamic and transport properties of mixing of liquid Cd-Pb and Cd-Sn alloys at 773K. The interaction energy in the alloys is found to be positive which suggests homo-coordination of atoms in the alloys. The viscosities of the alloys at 773K computed from two different approaches exhibit non-linear concentration dependence with the results for Cd-Sn alloy being in very good agreement and satisfactory agreement for Cd-Pb alloy. In lower concentrations of Cd-component, Cd-Pb alloy has larger viscosity and on the other side of concentration, Cd-Sn alloy has larger value. The calculations of inter-diffusion coefficients result in concave diffusion isotherms for the alloys. The higher values of inter-diffusion coefficients for Cd-Sn suggest that Cd and Sn metals tend to mix more readily than Cd and Pb metals do in Cd-Pb alloy. The correlation between viscosity and diffusion implies that the inter-diffusion coefficient is large for low viscous liquid alloy and vice-versa.

BIBECHANA 15 (2018) 113-120

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Abstract
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Published
2017-12-19
How to Cite
Koirala, R., Koirala, I., & Adhikari, D. (2017). Energetics of mixing and transport phenomena in Cd-X (X=Pb, Sn) melts. BIBECHANA (Journal of Physical Sciences), 15, 113-120. https://doi.org/10.3126/bibechana.v15i0.18751
Section
Research Article